Crossword Genius

Direction-finder's range (7)

Ross

I believe the answer is:

compass

I believe this is a double definition.

'direction-finder's' is the first definition.

'range' is the second definition.
(compass can mean range or scope)

(Other definitions for compass that I've seen before include "Box the ---, change fully round" , "Instrument for determining direction from magnetic needle" , "Course guide" , "Direction finder; scope" , "Range - vessel's navigating instrument" .)

I've seen this clue in The Telegraph.
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